Typewriter carriage mechanism



Jan. 12, 1932. M. GARBELL TYPEWRITER CARRIAGE MECHANISM Filed Oct. 28. 1927 3 Sheets-Sheet .IAQ g Z' y o )wang/5.

Jan. 12, 1932. M. GARBELL TYPEWRITER CARRIAGE MECHANISM Filed Yom. 28; 1927 3 sheets-sheet 2 jan. 12, 1932. M. GARBELL 1,841,109

TYPEWRITER CARRIAGE MECHANISM Filed Oct, A28. 1927 3 Sheets-Sheet 3 Patented Jan. 12, 1932 UNITED STATES PATENT oFFIcE MAX GARBELL, OF CHICAGO, ILLINOIS, ASSIGNOR TO VICTOR ADIDIINGry MACHINE COMPANY, F CHICAGO, ILLINOIS, A CORPORATION 0F ILLINOIS TYPEWRITER CARRIAGE MECHANISM Application led October 28, 1927. Serial No. 229,437.

My invention relates to typewriters and it has particular relation to case-shifting mechanism for said machines. More especially my invention relates to the structure and s method of mounting and moving a carnage in an arcuate direction to provide for proper case shifting position, and so far as the broad aspects thereof are concerned, thecarriage of my invention, which comprises a tiltable mounting is illustrated in my copendlng application Serial No."11,957, filed February 27, 1925.

The present invention relates to the manner of mounting the carriage assembly as a unit so that it may be accurately pivotally mounted to move freely under the slightest touch and at the same time be releasable so that the carriage assembly may be quickly removed from and placed vin operating position. To this latter end my invention, as I will hereinafterv more fully describe, com- 'prises abearing for each end of a shift on which shift the brackets supporting the bottom carriage rail are secured.

A further and very important phase of my invention resides in providing a non-chatter.- ing device for positively locking the carriage in one case shift position,so that it is necessary to move the shift key positively in order to move the carriage; in other words, the carriage cannot be moved by grasping the same with the hand as is the case with many machines. Such a provision is of particular ad- `vantage in connection with a tiltable case shifting platen, since the elements are so delicately adjusted in such a combination as to permit of said shift, and for this reason it is all the more necessary that some positive means be provided so that the carriage may be rigidly locked in position.

My invention may be better understood from a consideration of the accompanying.

drawings, in which Figure 1 1s a side elevational view of a 45 typewriter embodying` my invention, one portion of the frame being broken away to disclose certain elements of my invention; t

Fig. 2 is a fragmentary illustrative view of the manner in which my shift key lever is locked in up-case position;

Fig. 3 is a plan view of a typewriter with so much of the mechanism thereof outlined as is necessary to more fully understand my invention; i

Fig. 4 is an elevational sectional view on the line 4 4 of Fig. 3;

Fig. 5 is an elevational sectional View on the line 5-5 of Fig. 3;

Fig. 6 is a fragmentary perspective view of the manner in which the carriage assembly unit is constructed; and

Fig. 7 is a fragmentary view showing onel feature of my carriage assembly.

Referring now more particularly to the drawings, I illustrate a typewriter frame comprising a bottom frame member l0 eX- tending between -side portions 11 and 12 wherebya rigid inner structure may be comprised. Likewise extending between the side frame portions lland 12 are .combined bracing andi supporting members 13, 14 and 15. A shift key pivot bar 16 extends between securing members 17-17 arranged in the side frames, as best shown in Fig. 3.

Shift key levers 18 and 19 are hung on*v ysaid member 16 and are spring urged by springs 20 and 21 respectively, the latter being attached to the member 14. These shift key levers are provided with the usual buttons 22 and 23 respectively, while the lefthand end lever also carries a shift lock 24 comprising a bell crank 25 pivoted at 26 on an extension 27 extending upwardly from the key lever and in the plane thereof. One arm 28 of said bell crank 25 carries the button 24, while the other arm 29 is provided with a latch portion 30 so that when the button 24 is pressed downwardly the latch 30 swings under a projection 31 secured to the side frame -11 of the machine.

A spring 32 is connected between the lever 18 and the shift lock to effectl unlatching of the latter when the button 22 is depressed. The carriage assembly comprises in the main a platen 33 supported in side frames 34, the latter being secured to an upper rail 35. Said rail 35'is arranged t0, slide on a lower rail 36 through the interpositioning of bearing members 137.

The said rail assembly and the form of novel bearings which are hereillustrated, are more particularly described and claimed in my copending application Serial No. 191,650, filed May 16, 1927:

The lower rail 36 is secured to brackets 37-37 which brackets are peculiarly and, I believe, novelly, formed of two-ply material, as shown, and each comprises a bell crank structure having one arm thereof extending forwardly of the machine, with the two plies spread apart to comprehend planar portions 38 and 39, which thus form a substantiall)T T-shaped` footl with horizontal arms. The arms are expanded to form a channel or collar portion 40 through which a rod 41 extends, it being understood that the connection between the brackets 37 and the rod w41 is rigid. On said rod 41 is mounted a margin release assembly 42 so that when the carriage is shifted pivotally about said rod 41, the aforesaid release mechanism may befsimply moved therewith. 'v y The aforementioned carriage release mechanism 42 comprises Jinpart a collar ortionV 43 surrounding the rod 41 and mova le ro tatably thereabout against the action of a spring 44 to return the releasev mechanism 42 to its desired position, after the same has been operated. Y For a more complete understanding of the particular structure offrsaid carriage release structure, reference maybe had'to my copcnding application lSerial No. 229,436, filed October 28, 1927.

The carriage assembly is mounted in the side frames ofthe typewriter to permit pivotal movement ofthe platen for case shifting position by placing the outer ends of the rod 41 in the bearings, which latter comprise plates 45 secured to the inner side frames 11 and 12. Said plates 45 are provided with notches 46 which function as bearings for the ends of the rod 41 when the latter is held ink position, as best-shown in Fig. 5,"by a pivotally mounted arm 47.", d Y

Said arm 47 is provided with a lug 48 l turned at right-angles to its main portion with ascrew 49 threaded therethrough. This screw is adapted to be received in a lug .50 which is 'turned out from the plate 45. A seat nut 51 is slidable along the screw 49 to predetermine the closeness with which said arm 47 may approach the notch 461. 'y In this manner a very desirable adjustment is obtained wherefrom the maximum ease of movement by the rod 41 at its points of pivotal support may be obtained. By loosening said screw 49 and withdrawing the same from the lugs 50, the arms 47 may be swung downwardly to permit the withdrawal of the carriage assembly in a very simple and expeditious manner. i

The forwardly extending portion of the bell crank supporting brackets 37 is, as bel fore indicated, formed into coplanar portions 38 and 39. The shift key levers are arranged to have their rear ends 52 extend `under the near `planar portions 39 so that when the shift key lever is pivoted about the pivot bar 16, the lsaid portion 52 engaging the planar portion tilts the platen rearwardly to uppercase position.

Upper stops 5 3 are adj ustably mounted in ylugs 54, which latter are vsecured to the side of the side frame 12 is indented as at 58 to provide for the proper positionin of the screw portion 56 of the lower stop It will, moreover, be noted that the co planar portion 38 contacts with the lower stop 5 7, while the upper facesof both portions 38 and 39 Contact with the upper stop 53. In order to prevent chattering after the case shift moves, and further, in order to prevent the accidental movement of the platen gwhen the shift key is not operated, I provide a locking mechanism comprising a tiltably mounted lock member 59, which has a latch 60 overlying the member 39 and urged into positive locking position therewith by a spring 61; both the locking member 59 and the spring 61 being secured to a side web 62 of a channel member 63, which latter is provided for strengthening pur-poses as well and extends/between the side members of the inner frame. The lock member 59 is also .pro-4 vided with an extending lug 64 under which a release portion 65 ofthe shift levers 18 and 19 extends. y

When, therefore, the shiftrkey is depressed, the portion 65 which is integrally turned out from the rear end of the shift lever, rotates lock ortion 59 in a counterclockwise direction assuming that we are now speaking of thev mechanism at the right-hand side of the machine) thereby removing the latch portion 60 from above the port-ion 39 which, it will be remembered, is inte al with ,the bracket through which the carriage is shifted. Such release of the carriage occurs immediately `upon initial depression of the shift key.

n portion 39 thereby rigidly latching the carriage in its lower case position and positively preventing all chattering.

IVhile I have described but one embodiment of my invention together vwith the particular mechanism whereby said invention is practiced, it is obvious that many modifications may occur to those skilled in the art which will be well within the spirit of the present invention and the breadth of the appended claims even though varying in detail, and I desire, therefore, that my invention 'be limited only by the scope of the prior art and the appended claims.

I claim: y

l. In a typewriting machine, a carriage therefor which is mounted to be tiltably case shifted, case shift supporting means for said carriage comprising a lower rail, brackets l supporting the latter, a shaft on which said brackets are mounted and bearings for the ends of said shaft to permit the tilting of said carriage, said bearings comprising notched plates secured to the side frame of the machine, and pivotally movable, quickly detachable securing portions for holding said shaft ends in said notched plates.

2. In a typewriting machine, av carriage therefor which is mounted to be tiltably case shifted, case shift supporting means for said carriage comprising a lower rail, brackets supporting the latter, a shaft on which said brackets are mounted and bearings for the ends of said shaft to permit the tilting of said carriage, said bearings comprising notched plates secured to the side frame of the machine, and pivotally movable, quickly detachable securing portions for holding said shaft ends in said notched plates, and a line locking mechanism mounted on said shaft to be shifted with the carriage.

3. In a typewriting machine, a carriage therefor adapted to be tiltably case shifted, means for shifting said carriage, locking means effective to hold saidy carriage positivel'y rigid in lower case position and shiftable to non-locking position by the initial shifting movement of said shifting means, and an adjustable stop for predetermining the lower case position of said carriage, said lock being lVhen this latter movement occurs,'

automatically adjustable to accommodate any adjustment of said stop.

4. In a typewriting machine, a case-shiftable carriage, means for shifting said carriage comprising a substantially T-shaped foot and a lever adapted to engage one horizontal arm of said foot to lift the same, a lock for holding said carriage rigidly during writing comprising a latch cooperating with the said horizontal arm of said foot, and a positioning stop for the carriagecoope1'ating with the other horizontal arm of said foot.

5. In a typewriting machine, a case-shiftable carriage, means for shifting said carriage comprising a substantially T-shaped foot and a lever adapted to engage one horizontal arm of said foot to lift the same, and a lock for holding said carriage rigidly during writing comprising a latch cooperating with the said horizontal arm of said foot and shiftable to unlocked position by the initial movement of said lever and a positioning stop for the carriage cooperating with the other horizontal arm of said foot.

6. In a typewriting machine, a case-shiftable carriage, means for shifting said carriage comprising a substantially T-shaped foot and a lever adapted to engage one horizontal arm of said foot to lift the same, and a lock for holding said carriage rigidly during writing comprising a. latch cooperating with said foot and shiftable to unlocked position by the initial movement of said lever,said latch having one portion overlying the said horizontal arm of said foot to lock the latter', and another portion overlying said lever to be raised thereby and a positioning stop for the carriage cooperating with the other horizontal arm of said foot.

7. In a typewriting machine, a case-shiftable carriage, means for shifting said carriage comprising a substantially T-shaped foot and a lever adapted to engage one horizontal arm f said foot to lift the same, and a lock for holding said carriage rigidly during Writing comprising a latch cooperating with said footfand shiftable to unlocked position by the initial movement of said lever, said latch having one portion overlying the said horizontal arm of said foot to lock the latter, and another portion overlying said lever to be raised thereby and pivotally mounted to permit said unlocking movement, means for automatically returning said latch to foot-locking position when the case shift lever is released, and a positioning stop for the carriage cooperating with the other hori- Zontal arm of said foot.

8. In a typewriting machine, a carriage support therefor adapted to be tiltably'casc shifted, means for shifting said carriage support, an upper stop and a bottom stop for predetermining the limits of case shifting carriage movement, a substantially T-shaped foot on said carriage support, having one said carriage support, and a lock for hold-' ing said foot against one of said stops to prevent chattering, said foot being substantially T-shaped, one of the horizontal arms of'said foot beingr adapted to engage a stop and the other to be engaged by said lock and said lever. l

10. in a typewriting machine, a carriage support therefor adapted to be tiltably case shifted, means for shifting said carriage support, an upper stop and a bottom stop .for predetermining the limits of case shifting carriage movement, a foot on said carriage support, a lever engaging saidY foot to shift said carriage support, and a lock for holding said foot against one of-said stops to prevent chattering, said foot being spread apart into two planar portions, one of which bears against said bottom stop and the other of which is engaged on the under side by said lever and on the upper side by said lock while the upper portion of the foot as a whole contacts with the upper stop.

l1. ln a typewriting machine, a carriage support therefor adapted to be tiltably case shifted, means for shifting said carriage support comprising a shift lever mounted so that the rear end thereof is vertically movable and a bracket for said carriage support, said bracket having a horizontal foot por.- tion, a lower stop vagainst which said portion bears when said carriage support is in one case position, a pivotally mounted latch and a spring for urging the saine against the upper face of said foot to hold said bracket rigidly in-position', and a portion on said lever for nullifying said latch immediately prior to a case shift movement.

12. In a typewriting machine, a carriage therefor adapted to be tiltably case shifted, means for shifting said carriage comprising a shift lever mounted so that the rear end l thereof is vertically movable and a.bracket supporting said carriage, said bracket having a horizontal foot portion, a lower stop against which said portion nbears when said carriage is in one case position, a pivotally mounted latch and a spring for urging the same against the upper face of saidfoot to hold said bracket rigidly in position, and a portion on said lever for lifting said latch from said averi-ggfW aj locking position with respect to said foot and another portion onl said lever for lifting said foot to case shift said carriage. Y

A13. In a typewriting machine, a carriage therefor adapted to be ltiltably case shifted, means for shifting said carriage comprising a shift lever mounted so that the rear end thereof is vertically movable and a bracket supporting said carriage, said bracket having a horizontal foot portion, a lower stop against which said portion bears when said carriage is in one case position, a pivotally mounted latch and a spring for urging the same against the upper face of said foot to hold said bracket rigidly in position, and a portion` on said lever for lifting said latch from said overlying locking `position with respect to said foot and another portion on said lever for lifting said lfoot to case shift saidcarriage, said first named lever portion being effective to hold said latch out of engagement with said foot until the carriage is returned to initial position and said spring operating to move said latch into locking position as said carriage returns to normal rposition. 14. In a typewriting machine, a carriage' support therefor adapted to be tiltably case shifted, means for shifting said carriage support, an upper stop and a bottom stop for predetermining the limits of case shifting carriage movement, a foot on said carriagesupport, a lever engaging said foot to shift said carriage support, and a` lock for holding said foot against one of said stops to prevent chattering, said lower stop comprising an eccentrically mounted member shiftable about its center to varythe limiting position of said stop, and said' lock having means permitting the correct holding of said foot against the lower stop irrespective of the changed position of the latter. i

l5. In a typewriting machine, a carriage therefor which is mounted to be tiltably ease shifted, a case shift support for lsaid carriage comprising a lower rail, brackets supporting the latter, said brackets comprising a bell crank, one arm of which supports the carriage rail and the other arm of whichis expanded to form two planar or foot portions, extending fro-m the side of said arm, upper and lower stops against which said lying one of said feet to raise the latterand shift said carriage, the other of said feet engagmg said lower stop, and a lock overlying the lever-engaged foot to latch the same vfoot portions abut to limit the tiltablev movement 4of said carriage, a Shift lever undermounted and bearings for the ends of said shaft to permit the tilting of said carriage, said bearings comprising notched plates secured to the side frame, of the machine and pivotally movable, quickly detachable securing portions for holding said shaft ends in said notched plates, and a line locking mechanism mounted on said shaft to be shifted with the carriage, said entire carriage assembly including the line lock'mechanism being mountable as a unit in said bearings.

In Witness whereof, I have hereunto subscribed my. name.

' kMAX GARBELL. 

